lavfi/curves: fix memleak after master component dition.
lavfi/noise: remove pointless store

Signed-off-by: Paul B Mahol <onemda@gmail.com>
lavfi/histogram: remove pointless store

Signed-off-by: Paul B Mahol <onemda@gmail.com>
doc/filters: move aphaser to right(audio) chapter

Signed-off-by: Paul B Mahol <onemda@gmail.com>
FATE: add a test for the histogram filter

Signed-off-by: Paul B Mahol <onemda@gmail.com>
pca: use sizeof(variable) instead of sizeos(TYPE)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
pca: use av_calloc()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
swr/rematrix: use av_calloc()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>